Basic summary, as in what happened in Catharsis so far? If Kyo's not going to be interacting much with the other players, then you might not need it since each Catharsis is more or less a stand alone. But if Kyo is going to talk to the other PCs...

There are two active groups at the moment: Jay's group and Damien's group. Each player character has their own issues which lead them to this place. If you're interested in the details, I can do a longer summary. 

Can you tell me more about the Shintakes?